Update On ESC/POS Package Work

This article is originally published at https://rud.is/b

The morning before work was super productive and there is a nigh-complete DSL for ESC/POS commands along with the ability to just print {ggplot2}/{grid} object.

I changed the package name to {escpos} since it is no longer just plot object focused, and the DSL looks a bit like this:

library(stringi)
library(hrbrthemes)
library(ggplot2)
library(escpos)

ggplot() +
  geom_point(
    data = mtcars,
    aes(wt, mpg),
    color = "red"
  ) +
  labs(
    title = "A good title"
  ) +
  theme_ipsum_es(grid="XY") -> gg

epson_ip = "HOSTNAME_OR_IP_OF_YOUR_PRINTER"

escpos(epson_ip) |>
  pos_bold("on") %>%
  pos_align("center") %>%
  pos_size("2x") %>%
  pos_underline("2dot") %>%
  pos_plaintext("This Is A Title") %>%
  pos_lf(2) |>
  pos_underline("off") %>%
  pos_size("normal") %>%
  pos_align("left") %>%
  pos_bold("off") %>%
  pos_font("b") %>%
  pos_plaintext(
    stringi::stri_rand_lipsum(1)
  ) |>
  pos_lf(2) |>
  pos_font("a") %>%
  pos_plaintext(
    paste0(capture.output(
      str(mtcars, width = 40, strict.width = "cut")
    ), collapse = "\n")
  ) |>
  pos_lf(2L) |>
  pos_plot(gg, color = TRUE) %>%
  pos_lf(2L) |>
  pos_font("c") %>%
  pos_plaintext(
    stringi::stri_rand_lipsum(1, start_lipsum = FALSE)
  ) |>
  pos_lf(3) |>
  pos_cut() %>%
  pos_print()

FIN

I still need to make a more generic options “setter” (i.e. so one can set multiple modes in one function call), and I think supporting some kind of markdown/HTML subset to make it easier just to specify that without using the full DSL would be helpful. More updates over the coming weeks!

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This article is originally published at https://rud.is/b
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